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ATTACHMENT A <br /> SCOPE OF SERVICES <br /> RO/IX EVALUATION <br /> Owner: City of Decatur, IL <br /> Project: South Water Treatment Plant RO/IX Evaluation <br /> Engineer: Black& Veatch Corporation <br /> Introduction: <br /> The Engineer will perform the following tasks in completing an evaluation of RO versus IX for <br /> nitrate removal for the Owner's South Water Treatment Plant. The General Scope of Work was <br /> presented with the Owner's letter dated March 8, 1999. The March 8, 1999, General Scope of <br /> Work was amended by the Owner to add a 30 mgd plant production capability. A copy of the <br /> Owner's letter is attached and considered a part of this scope of services. <br /> Task 100. Project Initiation and Data Acquisition and Review <br /> The Engineer will collect existing information relevant to the evaluation of nitrate compliance costs, <br /> including applicable previous reports on nitrate removal costs using ion exchange technology and <br /> results of recent onsite membrane pilot testing and evaluation. This information will be reviewed to <br /> assist in establishment of the appropriate design parameters and operating assumptions for the <br /> full-scale treatment facilities, and to facilitate establishment of a common basis for development of <br /> probable costs for nitrate removal using ion exchange technology versus the membrane <br /> technology pilot tested at Decatur by Brian Hackman while he was a graduate research assistant at <br /> the University of Illinois at Urbana-Champaign. <br /> Task 200. Develop Preliminary Design Parameters and Site Layouts <br /> Conceptual descriptions of each nitrate removal treatment alternative for two treatment capacities <br /> (24 mgd and 30 mgd) and two raw water nitrate concentrations (12 mglL and 16 mglL, as N) will be <br /> prepared. These conceptual descriptions will characterize the major components of each <br /> alternative, identify requirements for interfacing with the existing treatment facilities, identify the <br /> requirements for disposal of wastewater / wash water, and facilitate development of opinions of <br /> probable construction and annual operating costs. Preliminary site layouts for each treatment <br /> alternative will be prepared. <br /> Task 300. Develop Capital Cost Data. <br /> Opinions of probable construction cost will be developed for both reverse osmosis and ion <br /> exchange treatment facilities for the capacity and operating conditions listed in Task 200 above. <br /> Probable costs will include allowances for incorporation of the new treatment facilities into the <br /> existing South Plant facilities and disposal of wastewater/wash water. ; <br /> A-1 � <br /> SLW16:071 <br /> 04/20199 <br /> i <br />